Add editable text areas to your drawing using the "Textbox" button in the "Main" application tab, or the "Label" symbol located under the "Basic Shapes" subcategory of the "Diagram Symbols" category in the left sidebar. Scheme-it's latest feature permits a user to insert an image in (png, jpg, and jpeg) file formats using the "Image LINK" section on the "Object" tab.
Add text to an existing diagram symbol by double-clicking it with the left mouse button. This brings up an editable text box that allows you to enter text using your keyboard.
The "Font" application tab allows you to change the size, color, and alignment of font objects. To use this function, select your text and then click on the desired function.